A modified version of a concentric twist. Did this as part of a birthday card for a friend. My teacher saw it and now we're making a much larger one with metal as part of a project.
wow, mind telling how you did that?
It's not that hard actually. It's just like a regular concentric circle just that you rotate each circle by 15 degrees after each circle. It' takes a little while to cut everything out though and circle cutters sometimes don't seen very reliable.